Temper-screw clamp.



No. 835,545. PATENTED NOV. 13, 1906.

P. H. MACK.

TEMPER $GREW CLAMP. APPLIOATION FILED JAN. 18. 1900.

' To all whom it may concern.-

UNITED STATES PAEENT OFFICE.

PATRICK H. MACK, OF INDEPENDENCE, KANSAS, ASSIGNOR OF ONE-HALF TO INDEPENDENCE IRON. WORKS COMPANY, OF LIMA, OHIO, A COR- PORATION OF OHIO.

TEMPER-SCREW CLAMP.

Patented Nov: 13, 1906.

Application filed January 18, 1906- Serial No. 298,717.

Be it known that I, PATRICK H. MACK, a citizen of the United States, residing at Independence, in the county of Montgomery and State of Kansas, have invented certain new and useful Improvements in Temper-Screw Clamps; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to that class of devices employed in drilling oil and AIt-esian wells or or like purposes commonly termed temper-screw clamps, the purpose of which is to effectively grip and detachably hold the wire rope or cable, whereby the drills and other tools are suspended and reciprocated in the drilling operations, and has for its object the'production of asimple and effective clamp readily adjustable and detachable and one adapted to secure and hold a wire drill-rope of any make by a frictiongrip against movement within the clamp without distortion of the rope or cable, so that any change in the twist of the strand or injury to the individual wires of the rope or cable is avoided.

This class of devices, as is well understood by those skilled in the art of drilling deep wells, forms the connection between the temper or feed screw and the drill-rope and is subjected not only to the weight of the drill-rope, but also its load or string of tools, which is frequently several thousand pounds, and to the jar of the drill-stroke andthe reaction jerkorwhi of thedrill,allof which tend to cause the s 'p or frictional movement of the wire rope or cable Within the clamp, which slip, if not overcome, results in reduced efficiency in the drill-tools, as well as ra id deterioration of the rope or cable.

the case of manila drill ropes or cables, wherein the common practice has been to employ short straight bore-clamp sections with a single centrallydisposcd C clamp or yoke secured to one of said sections, the slipping of the rope within the clam may be controlled by wrapping the rope, y wedging, and by similar means; but the same is ineffective for wire drill-r0 es or cables, which have largely superse ed the manila drill-ropes, for the reason that in the case of a wire drill-rope the clamp-sections are deficient in holding power, invariably spring alpart except at the point of application-of t e sections have been corrugated-as, for instance, with spiral corrugations to correspond with the strands of the rope or with plain curves to form an irregular rope-seat, and thus increase the hold of the clamp thereon; but while such constructions have been found more or less effective for the purpose it has been at a heavy cost in the Way of injury to the rope, as in the case of corrugations the individual wires are frequently unequally drawn and the metal set, while in the case of spiral corrugations or rope-seats, that are necessarily limited to a single make of wire rope, there is a tendency to a change in the twist of the strand under the weight and stretch of the rope, and where plain curves are employed to form the grip the bends thereby formed in the wire r0 e remain when released from the clamp, an when the rope is subsequently straightened out there frequently results a drawn, set, and weakened ective hold in the case of wire condition of some individual wires of the lation to the clamp-sections as to obviate the springing, spreading, or deflection of said sections, one or more of said clamp-yokes being preferably detachable from the clampsections, and such a construction embodies the main feature of my invention.

There are other minor features of invention, all as will hereinafter more fully appear;

In the drawin s forming a part of this specification and illustrating the application of my invention, Figure 1 1s a view in side elevation of a temper-screw clamp embodying my invention and the lower portion of a temper-screw or feed-screw and swivel-bar, as well as a portion of the wire drill rope or cable which suspends the drill-tools. Fig. 2

' on the line 3 3, Fig. 1.

longitudinal clamp-sections constituting the rope-clamp, each of which sections has a longitudinal groove or rope-seat 2 of cylindrical shape and each of which is rovided with a suitable hook or link eye 3 fiir the reception of a link 4, whereby the said clamp-sections 1 1 are independently secured to the swivelbar 5 of the temper-screw T, so that said sections may be separated laterally when desired to insert, remove, or adjust the drill rope or cable B... These sections 1 1?, may be of any desired length, but, preferably, for cfficiency, as well as for convenience, are about sixteen (16) inches long, and one of said clam sections 1' ad'acent to its link-eye 3 is usua y provided wit a plate .or raised seat 6 for thereception of the inner end of the screw of the upper clamp-yoke, and the opposite clamp-section 1 is provided with a threaded securin the u per clamp-yoke thereto.

7 indicates t e upper clamp-yoke, which is.

of general 0 form, one curved end of which encircles one of the longitudinal clamp-sections 1 and is secured thereto by a screwbolt 7 or its equivalent, while throu h a threaded opening in the opposite end 0 the clamp-yoke is inserted a clamp-screw 8, whose inner end is adapted to engage the plate or raised seat 6 on t while its outer end is provided with a handbar :8 for operating the clamp-screw 8.

Adjacent to its lower end one of said clampsections 1"-- is provided with a lug 1 which, as shown in the-drawings, 'is a threaded stub screwed thereinto, and said lug 1 supports and controls the position of the lower clampyoke of the temper-screw clamp and is preferably located on the same clamp-section which carries the raised seat 6, so that the upper and lower clamp-yokes 7 and 9 are reverselj disposed, which will prevent the interference of the hand-bars 8 10 of the clamp-screws.

iIIZHI'BSGHtS the lower clamp-yoke, which 9 is s ar to the upper clamp-yoke, except e clamp-section 1 ceases tions 1 l and produce an effective temperscrew clamp; but, if desired, the length of the clamp-sections 1 1* may be further extended and one or more intermediate clam -yokes' employed, in which case additional ugs 1", corresponding in number and location to the additional clamp-yokes, should be provided, and the additional yokes will be detachable from the clamp-sections 1 1, as in the case of lower clamp-yoke 9.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A temper-screw clamp having in combination a plurality of clamp-sections provided with ro e-seats having cylindrical surfaces, and a p urality of clamp-yokes. opening for the'reception ofa spt-screw for 2. A temper-screw clamp having in combination a plurality of clamp-sections provided with ro e-seats having cylindrical surfaces, and a p urality of clamp-yokes, one of which is independent of and detachable from the clamp-sections.

3. A temper-screw clamp, having a plurality of clamp-sections provided with ropeseats having cylindrical surfaces, and a plu-' rality of clam -yokes, said clamp-yokes being reversely isposed with relation to each ot er and the clamp-sections. Q

4. A temper-screw clamp having in combination a plurality of clamp-sections provided with ropesseats having cylindrical surfaces, one of said sections having a lug for supporting a detachable clamp-yoke, and a plurality of clamp-yokes, one of which is independent of and detachable from the clampsections.

In testimony whereof I affix my. signature in presence of two subscribing witnesses.

PATRICK H. MACK Witnesses:

WM. D. ONEiLL, JAMES Roman. 

